Bug report

Bug description:

While fixing pywin32 to let CI builds work in Python 3.13, the build process complained of not being able to find_PyLong_NumBits. All other Python versions in the CI built successfully.

BOOLPyCom_VariantFromPyObject(PyObject*obj,VARIANT*var){// ...if (PyLong_Check(obj)) {intsign=_PyLong_Sign(obj);size_tnbits=_PyLong_NumBits(obj);if (nbits== (size_t)-1&&PyErr_Occurred())return FALSE;// ...}

The function still exists inmain, apparently inaccessible via the public C API since 3.13. What's the recommended replacement?

CPython versions tested on:

3.8, 3.9, 3.10, 3.11, 3.12, 3.13

Operating systems tested on:

Windows

Linked PRs

• gh-119336: Restore _PyLong_NumBits #119418
• [3.13] gh-119336: Restore removed _PyLong_NumBits() function (GH-119418) #119970